Question

which of these formulas is the condensed structural formula for an alkane with three carbon atoms?
a c-c-c
b ch₃-ch₂-ch₃
c ch₂-ch=ch₂
d c₃h₈

Explanation:

• Option A: \(C - C - C\) is a skeletal formula, not a condensed structural formula.
• Option B: \(CH_3 - CH_2 - CH_3\) is the condensed structural formula for propane (\(C_3H_8\)), which is an alkane with three carbon atoms.
• Option C: \(CH_2=CH - CH_2\) has a double bond (\(C = C\)), so it is an alkene, not an alkane.
• Option D: \(C_3H_8\) is the molecular formula, not the condensed structural formula.

Answer:

B. \(CH_3 - CH_2 - CH_3\)